关于PDT安装的问题

PDT老是安装不起来，看了论坛里的一篇贴子，先装DLTK，再装PDT。
http://ask.dcloud.net.cn/article/145
按这个帖子处理了，但是，就是不成功。
在装PDT的时候出现如下信息：
Cannot complete the install because of a conflicting dependency.
Software being installed: PHP Development Tools (PDT) 3.2.0.201306051924 (org.eclipse.php.feature.group 3.2.0.201306051924)
Software being installed: PHP Development Tools (PDT) SDK Feature 3.0.0.v20110516-1100-77--84_23JBVgSVXO7XGJz0VLa9O (org.eclipse.php.sdk.feature.group 3.0.0.v20110516-1100-77--84_23JBVgSVXO7XGJz0VLa9O)
Only one of the following can be installed at once:
PHP Development Tools (PDT) 3.2.0.201306051924 (org.eclipse.php.feature.jar 3.2.0.201306051924)
PHP Development Tools (PDT) Runtime Feature 3.0.0.v20110516-1100-7V--F8NcJTTK4UE9TTJJ (org.eclipse.php.feature.jar 3.0.0.v20110516-1100-7V--F8NcJTTK4UE9TTJJ)
Cannot satisfy dependency:
From: PHP Development Tools (PDT) Runtime Feature 3.0.0.v20110516-1100-7V--F8NcJTTK4UE9TTJJ (org.eclipse.php.feature.group 3.0.0.v20110516-1100-7V--F8NcJTTK4UE9TTJJ)
To: org.eclipse.php.feature.jar [3.0.0.v20110516-1100-7V--F8NcJTTK4UE9TTJJ]
Cannot satisfy dependency:
From: PHP Development Tools (PDT) 3.2.0.201306051924 (org.eclipse.php.feature.group 3.2.0.201306051924)
To: org.eclipse.php.feature.jar [3.2.0.201306051924]
Cannot satisfy dependency:
From: PHP Development Tools (PDT) SDK Feature 3.0.0.v20110516-1100-77--84_23JBVgSVXO7XGJz0VLa9O (org.eclipse.php.sdk.feature.group 3.0.0.v20110516-1100-77--84_23JBVgSVXO7XGJz0VLa9O)
To: org.eclipse.php.feature.group [3.0.0.v20110516-1100-7V--F8NcJTTK4UE9TTJJ]

====================================================

不知道有没有人也碰到过这种问题，是怎么解决的？